Seat construction for cam followers



Aug. 5 1924.

M. M. WIL COX SEAT CONSTRUCTION FOR CAM FOLLOWERS Filed July 24, 1922 I V a. 'l// ,1

l atented Aug. 5, 1924.

:UNITED. isra'res hddfifihii earner caries.

MERRILL'M. WILCOX, OF SAGINAW', MICHIGAN, ASSIGNOR T0 WILCGX MOTO'R- PARTS & *MANUFACTURING 00., OF SAGINAVT, lVIICHIGAIi'. it. CORPORATION OF MICHIGAN.

SEAT CONSTRUCTION FOR CAM FOLLOW'ER-S.

Application filed July 24,

To all whom it may concern:

Be itknown that I, MERRILL M. 'lVILoox, a citizen of the United States of America, residing at Saginaw, in the county of Saginaw and State of Michigan, have invented certain new and useful Improvements in Seat Constructions for Cam Followers, of which the following is a specification, reference being had therein to the accompany-- ing drawings. This invention relates to valve operating mechanisms and particularly to seat constructions in tappets or cam followers.

An object of the invention is to provide a durable seat in the tappet which will withstand the pound of the push rod.

Another object is to provide a practical seat which can be readily repaired at a small cost and without destroying the tapet. p Another object is to provide an eflicient seat which is simple in construction and which can be manufactured at a very low cost. a

With the above and other objects in View the invention consists in certain novel features of construction as will be more fully described and particularly pointed out in the appended claims.

In the accompanying drawing:

Figure l is a side elevation of a tappet embodying my invention and showing the upper part thereof in section; I

Figure 2 1s a sectional view taken on the line 22 of Figure 1;

Figure 3 is a top plan view of my invention.

Referring now to the drawing in which like characters of reference designate corresponding parts throughout the several views, the numeral 1 designates a tappet having a socket 2 formed therein which is adapted to receive one end of a push rod, (not shown).

It is usually the practice to harden the portion of the socket forming the seat to withstand the pounding of the push rod but during the hardening process, a por tion of the tappet usually becomes cracked which necessitates the scrapping of the entire tappet. In the present instance, a plate 3, preferably constructed of tempered steel, is inserted in the socket 2 and placed in engagement with the bottom 4 thereof. A bushing 5 is also positioned in he sock 1922. Serial No. 577,263.

et so that the lower end thereof bears upon the upper surface of the plate. The upper end of the bushing is tapered as shown at 6 to facilitate the insertion of the cam follower. An annular flange 7 extends in wardly from the side walls of the socket at the outer end thereof and retains the bushing and plate in position in the sock et. This flange is formed by spinning over one edge of the tappet. If desired, the bushing may be constructed to have a tight fit within the socket to retain the plate in position, the flange? being dispensed with.

While it is believed that from the foregoing description the nature and advantages of the invention will be readily apparent, I desire to have it understood that I do not limit myself to what is herein shown and described and that such changes may be resorted to when desired, as fall Within the scope of what is claimed.

What I claim as my invention is:

1. The combination with a tappet having a socket formed therein, of a hardened insert located in said socket, and a bushing disposed within said socket and retaining said insert in position.

2. The combination with a tappet having a socket formed therein, of a hardened insert engaging the bottom of said socket, a bushing disposed within said socket and engaging said insert, and means at the outer end of said socket for retaining said bushing and insert in position.

3. The combination with a tappet having a socket formed therein, of a hardened insert engaging the bottom of said socket, a bushing bearing against said insert, and means extending inwardly from the walls of said socket for retaining said bushing and insert in position.

a. The combination with a tappet having a socket formed therein, of hardened member engaging the bottom of said socket, a bushing located within said socket and bearing against said member, and a flange extending inwardly from the walls of said socket for retaining said bushing and member in position.

5. The combination with a tappet having a socket, of an insert located in said socket having a hardened surface forming a seat for a valve push rod, a member located in said socket and engaging said in- 7. The combination with a tappet having a socket adapted to receive a valve push rod, of an insert in said socket having a hardened surface forming a seat for said push rod, and means Within said socket for retaining said insert in position.

In testimony whereof I affix my signature.

MERRILL M. WILCOX. 

